METHOD FOR OF PHYSICAL PROPERTIES IMPROVEMENT DURING KMR (SYNTHETIC POLYMER MANTLE PIPES) MAKING Russian patent published in 2017 - IPC B29C44/12 F16L59/14

Abstract RU 2608403 C2

FIELD: pipes.

SUBSTANCE: invention relates to production of insulated pipes and can be used in construction. Producing pipe for medium and mantle pipe. Pipe for medium is located inside mantle pipe, between them annular gap is formed with ends E1 and E2, which is filled with polyurethane system, containing one isocyanate component and one polyol mixture. In annular gap at end E1 foaming and curing of polyurethane system is carried out. Annular gap at end E2 is closed by cover, which has varying by value holes. Holes value during filling is continuously varied by rotating washer installed on cover.

EFFECT: invention enables reduction of foamed polyurethane pores diameter and low heat conductivity.

9 cl

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RU 2 608 403 C2

Authors

Ellerzik Karsten

Dates

2017-01-18—Published

2012-10-19—Filed